<template>
  <div>
    <nav class="shelf">
      <a href="" class="book home-page">首页</a>
      <a class="book about-us">关于我们</a>
      <a class="book contact">联系我们</a>
      <a class="book faq">F.A.Q.</a>
      <span class="book not-found" />
      <span class="door left" />
      <span class="door right" />
    </nav>
    <h1>Error 404</h1>
    <p>糟糕，您要找的页面不在系统中。。。</p>
  </div>
</template>

<script>

export default {
  name: 'Page404'
}
</script>

<style lang="css" scoped>
  div {
    height: 100vh;
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    margin: 0;
    padding: 0;
    background-color: #446072;
    font-family: "Microsoft YaHei",sans-serif;
    color: white;
    -webkit-box-pack: center;
    -webkit-justify-content: center;
    -ms-flex-pack: center;
    justify-content: center;
    -webkit-box-align: center;
    -webkit-align-items: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -webkit-flex-direction: column;
    -ms-flex-direction: column;
    flex-direction: column;
    overflow: hidden;
  }
  h1 {
    margin-top: 2rem;
  }
  p{
    font-family: "Microsoft YaHei","Segoe UI", "Lucida Grande", Helvetica, Arial,sans-serif;
  }
  .shelf {
    position: relative;
    width: 30rem;
    height: 14rem;
    border: 0.5rem solid #374d5b;
    border-radius: 0.5rem;
    background-color: rgba(255, 255, 255, 0.1);
    -webkit-perspective: 130rem;
    perspective: 130rem;
    box-shadow: inset 0 0 2rem rgba(0, 0, 0, 0.2);
  }
  .door {
    position: absolute;
    width: 14.8rem;
    height: 14rem;
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    box-sizing: border-box;
    padding: 1rem;
    background-color: #374d5b;
    -webkit-box-align: center;
    -webkit-align-items: center;
    -ms-flex-align: center;
    align-items: center;
    box-shadow: 0 1px 1px rgba(0, 0, 0, 0.3);
  }
  .door::before {
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.1);
    content: "";
  }
  .door.left {
    border-radius: 0 0.75rem 0.75rem 0;
    -webkit-box-pack: end;
    -webkit-justify-content: flex-end;
    -ms-flex-pack: end;
    justify-content: flex-end;
    -webkit-animation:
      leftDoorOpen 3.5s ease-out forwards 1s,
      leftDoorFlap 15s linear infinite forwards 9s;
    animation:
      leftDoorOpen 3.5s ease-out forwards 1s,
      leftDoorFlap 15s linear infinite forwards 9s;
    -webkit-transform-origin: 0 0 0;
    transform-origin: 0 0 0;
  }
  .door.right {
    right: 0;
    border-radius: 0.75rem 0 0 0.75rem;
    -webkit-animation:
      rightDoorOpen 3s ease-out forwards 1.5s,
      rightDoorFlap 10s linear infinite forwards 8s;
    animation:
      rightDoorOpen 3s ease-out forwards 1.5s,
      rightDoorFlap 10s linear infinite forwards 8s;
    -webkit-transform-origin: 100% 0 0;
    transform-origin: 100% 0 0;
  }
  .book {
    position: absolute;
    box-sizing: border-box;
    padding: 0.8rem 4rem 0.8rem 2rem;
    border-radius: 0.25rem;
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1rem;
    cursor: pointer;
    box-shadow: inset 0 0 0.75rem rgba(255, 255, 255, 0.1);
  }
  .book.home-page {
    -webkit-transform: rotate(-90deg) translate(-12.4rem, 3rem);
    transform: rotate(-90deg) translate(-12.4rem, 3rem);
    -webkit-transform-origin: 0;
    transform-origin: 0;
  }
  .book.about-us {
    -webkit-transform: rotate(-100deg) translate(-13.4rem, 6.1rem);
    transform: rotate(-100deg) translate(-13.4rem, 6.1rem);
    -webkit-transform-origin: 0;
    transform-origin: 0;
  }
  .book.contact {
    right: 2rem;
    bottom: 0.2rem;
    border-radius: 0.3rem 0 0 0.3rem;
  }
  .book.faq {
    right: 0.8rem;
    bottom: 3.3rem;
    border-radius: 0.3rem 0 0 0.3rem;
  }
  .book.not-found {
    width: 12rem;
    height: 3.5rem;
    border: 1px dashed rgba(255, 255, 255, 0.3);
    background-color: transparent;
    -webkit-transform: rotate(-90deg) translate(-12rem, 13rem) scale(1);
    transform: rotate(-90deg) translate(-12rem, 13rem) scale(1);
    -webkit-transform-origin: 0;
    transform-origin: 0;
    cursor: default;
    -webkit-animation: bookFadeOut 1s 3s infinite forwards;
    animation: bookFadeOut 1s 3s infinite forwards;
  }
  .book.not-found::after {
    display: block;
    width: 15rem;
    padding-left: 5rem;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='80' height='30'><path fill='rgb(255, 255, 255)' d='M7.688,3.737C6.1,10.409,4.624,16.982,2.475,23.517c-0.424,1.29,0.724,2.338,1.957,1.916 c5.879-2.021,11.743-4.107,17.409-6.696c1.246-0.572,0.443-2.366-0.815-1.932c-3.856,1.333-7.695,2.69-11.565,3.959 c2.879-2.526,5.485-5.215,9.013-7.17c4.441-2.459,9.299-4.109,14.281-4.915c10.903-1.772,22.052,0.562,31.979,5.04 c9.241,4.162,12.895,8.725,13.164,4.942c0.121-1.69-5.57-4.953-14.125-8.714C53.19,5.292,41.094,3.539,29.636,6.058 c-7.122,1.567-16.708,5.374-22.064,11.544c1.359-4.455,2.461-9.028,3.032-13.563C10.852,2.091,8.12,1.927,7.688,3.737z'/></svg>");
    background-repeat: no-repeat;
    background-size: 4rem;
    background-position: left center;
    font-family: "Dancing Script";
    text-transform: lowercase;
    font-size: 25px;
    content: "this page can't be found";
    -webkit-transform: rotate(90deg) translate(6rem, -1rem);
    transform: rotate(90deg) translate(6rem, -1rem);
    opacity: 0.3;
  }
  .book:hover:not(.not-found) {
    background-color: rgba(255, 255, 255, 0.2);
  }
  @-webkit-keyframes leftDoorOpen {
    60% {-webkit-transform: rotateY(-115deg);transform: rotateY(-115deg)}
    100% {-webkit-transform: rotateY(-110deg);transform: rotateY(-110deg)}
  }
  @keyframes leftDoorOpen {
    60% {-webkit-transform: rotateY(-115deg);transform: rotateY(-115deg)}
    100% {-webkit-transform: rotateY(-110deg);transform: rotateY(-110deg)}
  }
  @-webkit-keyframes rightDoorOpen {
    60% {-webkit-transform: rotateY(125deg);transform: rotateY(125deg)}
    100% {-webkit-transform: rotateY(120deg);transform: rotateY(120deg)}
  }
  @keyframes rightDoorOpen {
    60% {-webkit-transform: rotateY(125deg);transform: rotateY(125deg)}
    100% {-webkit-transform: rotateY(120deg);transform: rotateY(120deg)}
  }
  @-webkit-keyframes rightDoorFlap {
    0% { -webkit-transform: rotateY(120deg); transform: rotateY(120deg)}
    5% {-webkit-transform: rotateY(125deg);transform: rotateY(125deg)}
    15% {-webkit-transform: rotateY(117deg);transform: rotateY(117deg)}
    25% {-webkit-transform: rotateY(123deg);transform: rotateY(123deg)}
    30% {-webkit-transform: rotateY(120deg);transform: rotateY(120deg)}
    100% {-webkit-transform: rotateY(120deg);transform: rotateY(120deg)}
  }
  @keyframes rightDoorFlap {
    0% { -webkit-transform: rotateY(120deg); transform: rotateY(120deg)}
    5% {-webkit-transform: rotateY(125deg);transform: rotateY(125deg)}
    15% {-webkit-transform: rotateY(117deg);transform: rotateY(117deg)}
    25% {-webkit-transform: rotateY(123deg);transform: rotateY(123deg)}
    30% {-webkit-transform: rotateY(120deg);transform: rotateY(120deg)}
    100% {-webkit-transform: rotateY(120deg);transform: rotateY(120deg)}
  }
  @-webkit-keyframes leftDoorFlap {
    0% { -webkit-transform: rotateY(-110deg); transform: rotateY(-110deg)}
    5% {-webkit-transform: rotateY(-115deg);transform: rotateY(-115deg)}
    15% {-webkit-transform: rotateY(-107deg);transform: rotateY(-107deg)}
    25% {-webkit-transform: rotateY(-113deg);transform: rotateY(-113deg)}
    30% {-webkit-transform: rotateY(-110deg);transform: rotateY(-110deg)}
    100% {-webkit-transform: rotateY(-110deg);transform: rotateY(-110deg)}
  }
  @keyframes leftDoorFlap {
    0% { -webkit-transform: rotateY(-110deg); transform: rotateY(-110deg)}
    5% {-webkit-transform: rotateY(-115deg);transform: rotateY(-115deg)}
    15% {-webkit-transform: rotateY(-107deg);transform: rotateY(-107deg)}
    25% {-webkit-transform: rotateY(-113deg);transform: rotateY(-113deg)}
    30% {-webkit-transform: rotateY(-110deg);transform: rotateY(-110deg)}
    100% {-webkit-transform: rotateY(-110deg);transform: rotateY(-110deg)}
  }
  @-webkit-keyframes bookFadeOut {
    50% {border: 1px dashed rgba(255, 255, 255, 0.1);}
  }
  @keyframes bookFadeOut {
    50% {border: 1px dashed rgba(255, 255, 255, 0.1);}
  }
</style>
